Relative; definition; Online Dictionary:
1. Having pertinence or relevance; connected or related
Yes, well, if you had instead written: "What are some of the things that irritate you having pertinence or relevance to how members communicate", that would have been equally annoying.
There is a word which would have expressed exactly what you meant. That word is "about". As in: "What irritates you
about how members communicate?"
Avoiding natural usage doesn't make you sound intelligent even if you get it right: it just makes you sound pretentious. Doing so and getting it
wrong is unforgiveable. And the result is that a ten-year old would have written the sentence better than you did, since a ten-year old would certainly have written "about".